Note: The name is now applied to all porcelain clays which
endure the fire without discoloration.
2. (Poetry & Script.) Earth in general, as representing the
elementary particles of the human body; hence, the human
body as formed from such particles.
I also am formed out of the clay. --Job xxxiii.
6.
The earth is covered thick with other clay, Which
her own clay shall cover. --Byron.
{Bowlder clay}. See under {Bowlder}.
{Brick clay}, the common clay, containing some iron, and
therefore turning red when burned.
{Clay cold}, cold as clay or earth; lifeless; inanimate.
{Clay ironstone}, an ore of iron consisting of the oxide or
carbonate of iron mixed with clay or sand.
{Clay marl}, a whitish, smooth, chalky clay.
{Clay mill}, a mill for mixing and tempering clay; a pug
mill.
{Clay pit}, a pit where clay is dug.
{Clay slate} (Min.), argillaceous schist; argillite.
{Fatty clays}, clays having a greasy feel; they are chemical
compounds of water, silica, and aluminia, as {halloysite},
{bole}, etc.
{Fire clay}, a variety of clay, entirely free from lime,
iron, or an alkali, and therefore infusible, and used for
fire brick.
{Porcelain clay}, a very pure variety, formed directly from
the decomposition of feldspar, and often called {kaolin}.
{Potter's clay}, a tolerably pure kind, free from iron.